Don't insert elements transitions into normalized maps

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 083bce8b54aac80d26aade82102e255cf61ea6a1..3d45d7854f665f2fc2872c70ce47d1f2f41eca02 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -6228,7 +6228,6 @@ class Map: public HeapObject {
       Handle<LayoutDescriptor> layout_descriptor);
 
  private:
-  static void ConnectElementsTransition(Handle<Map> parent, Handle<Map> child);
   static void ConnectTransition(Handle<Map> parent, Handle<Map> child,
                                 Handle<Name> name, SimpleTransitionFlag flag);
 
@@ -6266,9 +6265,6 @@ class Map: public HeapObject {
   // the descriptor array.
   inline void NotifyLeafMapLayoutChange();
 
-  static Handle<Map> TransitionElementsToSlow(Handle<Map> object,
-                                              ElementsKind to_kind);
-
   void DeprecateTransitionTree();
   bool DeprecateTarget(PropertyKind kind, Name* key,
                        PropertyAttributes attributes,